LED Meters, Sub Pan, Sub PFL LED, Sub Mute

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29. LED Meters

Six 12-segment LED arrays monitor the levels of the sub mixes and the main L-R outputs. The 0 dB reference level corresponds to +4 dBu. The L-R meter array is also used for PFL metering. (See #18, 28 and 33)

30. Sub Pan

Sets the position of the sub mix in the L-R stereo field.

31. Sub PFL LED

Illuminates when the Sub PFL switch (#33) is depressed to indi- cate that this signal has been assigned to the PFL mix.

32. Sub Mute

Mutes the sub mix signal to the sub output and to the L-R mix. It does not affect the PFL signal, which can be used to check the levels when the sub mix is muted.

33. Sub PFL

Connects the sub signal (pre-master level) to the PFL mix and switches the headphone/control room source from the L-R mix

to the PFL mix. It also connects the PFL mix signal to the L-R meters. (See #32.)

34. Sub L-R assign

Assigns the sub mix to the L-R mix with its stereo position deter- mined by the Sub Pan control (#30).

35. Sub Fader

Sub mix output level control. Sets the level sent to the output jack and the L-R assign switch (#34). The optimum setting for this control is the “0” (unity gain) position.

36. Master Left and Right Faders

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37. Stereo Returns 1 & 2

These are basic stereo input channels with level, pan, mute, PFL, and assignment switches. An LED that indicates both clipping and PFL is the same as that on the input channels. These inputs are line level and can be used for effect returns, tape inputs, or for slave mixer inputs.

38. Stereo Returns 3 & 4

Similar to the Stereo Returns 1 & 2, these two returns have treble and bass controls in addition to mono sends to the AUX 1 and AUX 2 mixes. These returns can be used as additional stereo input channels. (See #37.)

These are the main faders that set the level of the left and right mix (both balanced and unbalanced). The output levels are monitored by the left and right meters. The optimum setting for these controls is the “0” (unity gain) position.

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